Window-sash attachment



G. H. GU STAF SON. WINDOW SASH AITACHMENT.

APPLICATION FILED APR. I91'19l7.

1,33 ,430, Patented Apr. 13, 1920.

GEORGE E. GUSTAFSON, 0F J'OLIET, ILLINOIS.

WINDOW-SASH ATTACHMENT.

Specification of Letters Patent.

Patented Apr. 13, 1920.

Application filed April 19, 1917. Serial No. 163,162.

To all whom it may concern;

Be it known that I, GEoneE H. GUSTAFSON, a citizen of the United States,residing at Joliet, in the county of Will and State of Illinois, haveinvented certain new and useful Improvements in Window-Sash Attachments,of which the following is a specification.

My invention relates to window sash attachments, and is a burglar-proofwindow sash stay lock, and the object of my invention is to prevent theupper and lower sashes from lapping beyond a certain point, and thusrender it practically impossible for burglars to gain entrance to thebuilding by any manipulation of the sashes, my device being in suchposition that it cannot be reached by burglar tools from the outside.

I attain these objects by the mechanism illustrated in the accompanyingdrawings, in which Figure l is a front view; and Fig. 2 is a side-edgeview.

The main piece 1 is fastened to the inner edge of a side piece of awindow sash 7, just far enough from the bottom to allow the upper sashto be lowered slightly for purposes of ventilation. Said main-piece iscut away in the center of one of its sides, and the upper and lowerprojections are turned and form the tubes 99. The stay-plate 2, also, isturned and forms the tube 10. A slot is cut into the upper tube 9 at itsbottom, and into tube 10 at its top, thus forming the shoulders 8, and8, which engage each other when the device is in a locked position. Thebolt 3 is slidable in all of said tubes, and has its upper end kept inprojection by means of the spiral spring 4 coiled thereon between thecap of bolt 3 and the upper end of the tube 9. By pressing down on thecap of bolt 3, and thus overcoming the resistance of spring 4, theshoulders of tubes 9 and 10 are moved out of engagement, and stay-plate2 can be lapped back over the main-piece 1, and the device thusunlocked, said'bolt 3 beingprovided with a flange 11 to prevent plate 2from sliding below a certain point on said bolt. The lower end of saidbolt 3 is threaded and the nut 5 screwed thereon. As shown in Fig. 1,the device can not be unlocked until the nut 5 is screwed upward to acertain distance. The spring 4 holds tubes 9 and 10 in engagement, whenstay-plate 2 is turned back into locked position.

IVhat I claim is- 1. A window sash attachment, comprising, a metal platefastened to the inner edge of a side piece of an upper sash of a windowand inside of the window pane, one side of said plate being cut away inthe center leaving projections above and below; an upper and lower tube,each formed by turning said projections inward on said plate, the upperof said tubes having a shoulder at its lower end; a metal stay-plate,turned on one of its sides and forming an integral tube, said tubehaving a shoulder on its upper end to engage the shoulder of said uppertube; a bolt with a capped end movable through all of said tubes; aretracting spiral spring coiled on the projecting end of said bolt; aflange on said bolt below the middle one of said tubes; a nut adapted tobe screwed over the threaded end of said bolt; and means for fasteningthe device to a window sash, whereby said attachment can be held inlocked position.

2. A safety ventilating window-sash lock, comprising a hinge, one leafof which is fastened to the window sash and the other used as a stay; ahinge-bolt; a spring coiled on the end of the hingebolt and adapted tohold the device in locked or staying position, yet under pressure,permitting said stay to be moved out of locked position; a nut screwableon the threaded end of said hingebolt and adapted to hold said stay inan immovable locked position and means for holding said device in alocked position.

In testimony whereof I afiix my signature in presence of two witnesses.

GEORGE H. GUSTAFSON.

Witnesses:

S. A. GooDsPnED, M. A. Goonsrnsn.

